AIRBAG SYSTEM (DIAGNOSTICS) > Diagnostic Chart with Trouble Code

DTC DETECTING CONDITION:

Airbag control module is faulty.

CAUTION:

• Before diagnosing the airbag system, be sure to turn the ignition switch to OFF, disconnect the ground terminal from battery, and wait 20 seconds or more before starting to work.

• When replacing the airbag module, seat belt pretensioner, lap seat belt pretensioner, roll connector, control module and sensor, reconnect each part and check that the warning light operates properly.

STEP	CHECK	YES	NO
1.CHECK IF DTC 21 IS INDICATED. Read the DTC.	Does the Subaru Select Monitor display DTC21?	Replace the airbag control module.	Perform the Clear Memory Mode.